4. Cardio- Starlings Law Of The Heart Flashcards
1
Q
Starlings law
A
Starlings law:
•increased venous return > greater diastolic filling of the heart > cardiac muscles stretched > more force of contraction > increased ejection fraction
-starlings law explains how stroke volume increases during exercise. This occurs when there is an increase in venous return, which leads to greater diastolic filling, so the cardiac muscle is stretched. Consequently, a more powerful force of contraction takes place, which increases the ejection fraction and therefore increases the stroke volume.
Ejection fraction- refers to the percentage of blood pumped out the left ventricle per beat.
